E.S.
I feel for you. We went through this with our son, but when he was 7 mos. I was telling the pediatrician about my son waking up every hour to nurse and he didn't judge or anything, just said "And how do you like that?" I remember starting to cry (was just SO tired as you well know) and saying "I don't like it at all..." I highly recommend the book "Healthy Sleep Habits, Happy Child" by Marc Weissbluth. A friend recommended it to me back when my son was having problems staying down; I read it and started the next day. It was like, I knew what to do (let him cry it out) but couldn't do it until I saw it in writing.
It's going to be tough going for a week or 10 days (but you will see results), and you both have to be strong and use the method for naps and nighttime. However, continuing to come in, pick him up etc. every time he cries, this is going to go on and on for years, and you'll have created a kid who is a bad sleeper (and you don't that -- my SIL has three and her life is not so fun at night). Unless he has some other nutritional issues, his need for the bottle is psychological. Instead, try leaving a sippy cup (filled with water) in his bed. Seriously though, check that book out and read it -- it will give you the courage to "sleep-train" your child, and you'll both be sane again someday soon!